34701 datasheet(8/38 Pages) FREESCALE

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Analog Integrated Circuit Device Data

Freescale Semiconductor

34701

ELECTRICAL CHARACTERISTICS

STATIC ELECTRICAL CHARACTERISTICS

BUCK CONVERTER (CONTINUED)

High-Side Power MOSFET Q1 RDS(ON) (9), (10)

ID = 500 mA, TA = 25°C, VBST = 8.0 V

RDS(ON)Q1

–60

–

Ω

Low-Side Power MOSFET Q2 RDS(ON) (9), (10)

ID = 500 mA, TA = 25°C, VBST = 8.0 V

RDS(ON)Q2

–65

–

Ω

Buck Converter Peak Current Limit (High Level)

ILIMH

-4.0

-2.7

-1.5

VOUT Pulldown MOSFET Q3 Current Limit

TA = 25°C, VBST = 8.0 V

ILIMPQ3

0.75

–

2.0

VOUT Pull-down MOSFET Q3 RDS(ON)

(10)

ID = 1.0 A, VBST = 8.0 V

RDS(ON)PQ3

––

1.9

Ω

Thermal Shutdown (VOUT Pull-down MOSFET Q3) (9)

TSD

150

170

190

°C

Thermal Shutdown Hysteresis (9)

THYS

–10

–

°C

Notes

Design information only. This parameter is not production tested.

10.

ID is the MOSFET drain current.

Table 3. Static Electrical Characteristics (continued)

Characteristics noted under conditions -40°C ≤ TA ≤ 85°C unless otherwise noted. Input voltages VIN1 = VIN2 = 3.3 V using

the typical application circuit (see Figure 33) unless otherwise noted.

Characteristic

Symbol

Min

Typ

Max

Unit

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